96 results about "Electrode adhesive" patented technology

The invention provides a lithium ion battery, a negative plate thereof and a preparation method thereof. The negative plate comprises a negative electrode current collector, and a negative film which is arranged on the negative electrode current collector and comprises a negative electrode active material, a negative electrode adhesive and a conductive agent of the negative electrode. The negative electrode active material comprises a silicon-based active material and a carbon-based active material; the negative electrode adhesive is distributed on the surface of the negative electrode active material; the surface of the silicon-based active material contains -OH; the negative electrode adhesive at least comprises a -COOM adhesive; and the mass ratio of the negative electrode adhesive distributed on the surface of the silicon-based active material to the silicon-based active material is larger than the mass ratio of the negative electrode adhesive distributed on the surface of the carbon-based active material to the carbon-based active material. The negative plate provided by the invention is used for improving the binding power of granules of the silicon-based active material and can solve the problem that the charge and discharge performance of the carbon-based active material is deteriorated due to excessive negative electrode adhesive. The lithium ion battery provided by the invention has good low temperature discharge performance and high temperature cycling performance.

The invention discloses a low-temperature type lithium ion secondary battery. The low-temperature type lithium ion secondary battery comprises a positive electrode, a negative electrode and an electrolyte, wherein the positive electrode is prepared from the following components including a positive electrode electroactive substance, a positive electrode conductive agent and a positive electrode adhesive; the positive electrode electroactive substance is spinel type lithium manganate, the positive electrode conductive agent is arbitrary more than two of superconductive carbon black, Super-P, KS-6, VGCF or a carbon nano tube, the positive electrode adhesive is polyvinylidene fluoride; the negative electrode is prepared from the following components including a negative electrode electroactive substance, a negative electrode conductive agent and a negative electrode adhesive; the negative electrode electroactive substance is spinel type lithium titanate, the negative electrode conductive agent is arbitrary one or more of the superconductive carbon black, the Super-P, the VGCF or the carbon nano tube, the negative electrode adhesive is the polyvinylidene fluoride; a solvent of the electrolyte is three or more of DMC, EMC, DEC, PC and EA but at least contains the PC and the EA, a solute of the solvent is lithium hexafluorophosphate, the melting point of the electrolyte is smaller than 40 DEG C below zero, and the viscosity is smaller than 3cP. The low temperature type lithium ion secondary battery can be safely charged under the low-temperature condition and is excellent in the charging and discharging cycle performance at low temperature.

The invention discloses a lithium ion battery silicon-based negative electrode adhesive and a preparation method of the negative electrode piece with the same. The adhesive is prepared according to the method including steps: ultrasonically dispersing graphite oxide into water to obtain graphite oxide (GO) aqueous dispersion in concentration of 0.5-5mg/mL, adding a modified SBR adhesive, and stirring to obtain the lithium ion battery silicon-based negative electrode adhesive (GO/modified SBR), wherein a mass ratio of GO to modified SBR adhesive is 1:10-1:50. By the adhesive, the cycle performance of silicon-based negative electrodes can be improved, and first-time coulomb efficiency of the silicon-based negative electrode materials is improved to a certain extent. Consumption of the conducting agent in a silicon-based negative electrode system is reduced, integral energy density of lithium ion batteries can be improved beneficially, and the method is simple in process and suitable forlarge-scale production.

The invention relates to a combination for capacitor electrode adhesive, capable of providing the serum with excellent electrochemistry stability and adhesive ability of afflux body for forming the electrode and uniformity of coating when the afflux body is porous and the serum unable of blocking the afflux body grid. The combination for capacitor electrode adhesive comprises the polymer combination comprising (a) component: fluorine polymer 5-20 weight% and (b) component: (methyl) acrylics polymer 80-95 weight% containing the structure unit of the monomer represented by the general formula (1), namely granular polymer combination with number-average grain size of 0.1-0.4 Mum, general formula (1) CH2=CR1COOR2, in the general formula (1), R1 represents hydrogen atom or methyl, R2 represents alkyl or cycloalkyl of carbon atom number 1-18.

The invention provides an electrode adhesive for a lithium ion battery. The adhesive is a lithium ion polymer adopting an aromatic benzene ring as a main chain and adopting fluorine-containing lithium sulfimide as a side chain. Compared with the prior art, the adhesive can form co-complexation bridging with high-energy-density active compounds such as nanometer silicon, is good in adhesiveness, and can adapt to stress influences generated by volume changes of active compounds in charge and discharge processes. The adhesive is good in lithium ionic conductivity, thus overcoming problems that charge-discharge properties of lithium ion batteries are influenced and battery capacity rapidly decreases during high-rate charging and discharging in particular, which are caused by low lithium ionic conductivity of adhesives at present. The adhesive has a good application prospect in all-solid-state polymer lithium ion batteries, gel state polymer lithium ion batteries, integrated polymer lithium ion batteries, and the like.

Disclosed are a separator having an electrode adhesive layer and an electrochemical device including the same. The electrode adhesive layer includes organic particles and an acrylic resin binder. Preferably, the acrylic resin binder is present in an amount of 30 wt % or more, so that a film-shaped electrode adhesive layer can be formed even when the organic particles have a particle diameter smaller than that of the pores of the underlying substrate or voids of the underlying porous coating layer.

The invention discloses a preparation method of lithium battery negative electrode slurry. The preparation method comprises the following steps: step one, weighing graphite, a conductive agent and sodium carboxymethylcellulose dry powder in a mass ratio of (93 to 96): (2 to 5): (1.8 to 2.5), then adding the graphite, the conductive agent and partial sodium carboxymethylcellulose dry powder with the solid content of 30% to 70% into a stirring tank, and starting roatation and revolution of the stirring tank for first stirring; step two, adding partial deionized water with the solid content of 20% to 60% in deionized water with the solid content of 45% to 50% for second stirring; step three, adding remaining partial sodium carboxymethylcellulose dry powder with the solid content of 70% to 30% for third stirring; step four, adding remaining partial deionized water with the solid content of 80% to 40% for fourth stirring; step five, adjusting the rotation of the stirring tank for fifth stirring, and connecting circulating cooling water; step six, adding a negative electrode adhesive, and then adjusting the rotation of the stirring tank again for sixth stirring; and step seven, stopping the rotation of the stirring tank, then adjusting the revolution of the stirring tank for seventh stirring to obtain a product, and carrying out vacuum defoamation on the product.

The invention discloses a high-temperature resistance lithium ion secondary battery adhesive and a preparation method thereof. The preparation method adopts 2-acrylamide-2- methylsulfonate, itaconate, dimethyl itaconate, maleic anhydride, and fumarate as the initial monomer, and carboxymethyl cellulose salt as the auxiliary agent. The reactants polymerize under the inducing of persulfate thermal free radical initiator, so as to produce homogeneous and stable electrode adhesive. The electrode adhesive prepared according to the preparation method has the advantage of high-temperature resistance, and is suitable for being applied to high power-density and high energy-density lithium ion battery.

The invention discloses a lithium battery electrode adhesive and a preparation method thereof. The lithium battery electrode adhesive is prepared from the following raw materials in parts by weight: 600-800 parts of acrylic ester, 40-80 parts of acrylate monomer, 200-300 parts of acrylic ester polyhydric alcohol, 1-5 parts of cyclohexanone 1,2-propylene glycol ketal, 0.5-3 parts of carbon nanotubeand 0.01-0.1 part of azo-bis-iso-heptonitrile. The lithium battery electrode adhesive prepared by the preparation method has a good protection function on the lithium battery electrode, can be dust-proof and water-proof, does not crack at low temperature, and has excellent adhesive property. The acrylic ester polyhydric alcohol and the carbon nanotube are added to be favorable for improving the discharging stability of the lithium battery, improving electrolysis resistance and prolonging the service life of the lithium battery.

The invention relates to the technical field of lithium ion batteries, and in particular relates to conductive slurry for a lithium ion battery. The conductive slurry comprises positive electrode conductive slurry coated on a positive electrode plate and negative electrode conductive slurry coated on a negative electrode plate; according to mass percent, the positive electrode conductive slurry comprises 92.5%-95.5% of positive electrode active materials, 0.5%-3.5% of positive electrode adhesives and 2.5%-5.5% of conductive agents; and the negative electrode conductive slurry comprises 93%-96% of negative electrode active materials, 1.4%-3.4% of negative electrode adhesives, 0.9%-3.9% of conductive agents and 0.2%-2.2% of thickening agents. The prepared conductive slurry is stable in conductivity, good in dispersion effect and hard in settlement. The invention further relates to a preparation method of the conductive slurry, an electrode plate containing the conductive slurry, and the lithium ion battery.

The invention discloses copolymer latex for a negative electrode of a lithium ion secondary battery. Firstly, styrene, butadiene and unsaturated carboxylic acid monomers are copolymerized to prepare ahard core, and butadiene, styrene and vinyl unsaturated monomers are copolymerized to prepare a soft shell so that a latex product with a hard core and soft shell structure is prepared, and the latexproduct is particularly suitable for a lithium ion secondary battery negative electrode adhesive. Research finds that the copolymer latex with the polymer particles with the hard-core and soft-shellstructures can improve the cohesiveness so that the dosage of the adhesive is reduced, and the influence of the adhesive on the internal resistance of the battery is reduced. The functional group introduced by copolymerization can change the polarity and dielectric properties of the polymer, thereby improving the electrolyte swelling resistance of the adhesive and the influence on the internal resistance of the battery.

The invention relates to a preparation method for a positive electrode of a ternary power lithium ion battery and the lithium ion battery, and belongs to the technical field of lithium ion batteries.The invention aims at solving the problems that the energy density, the power performance and the cycle performance of an existing lithium ion battery cannot meet the existing requirements. The methodcomprises the following steps of opening a stirring tank, adding a conductive agent, a ternary NCM, a positive electrode adhesive and NMP according to a mass ratio designed by a formula, stirring anduniformly dispersing at the revolution speed of 20-60 rpm and the rotating speed of a dispersing disc of 200-2000 rpm, adjusting the revolution speed to be 10-30 rpm, taking the material and measuring a solid content, opening a vacuum pump, keeping the vacuum degree to -0.08 to 0.09 MPa, stirring for 30 minutes, discharging the vacuum to obtain positive electrode slurry, and coating the positiveelectrode slurry on a positive electrode current collector in order to obtain the positive electrode. The prepared positive electrode is good in bonding force, high in ionic conductivity and capable of realizing high-rate rapid charging and discharging of the ternary lithium ion battery.

The invention relates to the field of lithium ion battery, and discloses a nickel-cobalt-manganese NCM ternary material power lithium ion battery including a positive electrode and a negative electrode; a positive electrode material includes, in parts by weight, 93-95 parts of a nickel-cobalt-manganese NCM ternary material, 3.5-4.5 parts of a positive electrode conductive agent, 2-3 parts of a positive electrode adhesive, and 15-25 parts of a dissolving agent; the negative electrode material includes, in parts by weight, 94-96 parts of a negative electrode particle material, 0.9-1.2 parts of anegative electrode conductive agent, 2-2.4 parts of a thickening agent, and 2-2.4 parts of a negative electrode adhesive; the negative electrode particle material has a core-shell structure, a core material is artificial graphite, and a shell material is amorphous carbon. The positive electrode material well cooperates with the negative electrode material; the negative electrode material has small particles and has good adhesion power and uniformity on a copper foil, and the contact internal resistance is low. After the lithium ion battery is prepared, not only is the internal resistance of the battery reduced, but also the low temperature performance, the high temperature performance and the cycle performance of the battery can be improved.

The present invention relates to a binder for a secondary battery electrode, a secondary battery electrode composition including the binder, and a secondary battery using the same. The binder includes a copolymer having a polyvinyl alcohol (PVA) and an ionically substituted acrylate. The binder may have an excellent electrode adhesive force, prevent an electrode deformation caused by the expansion and contraction of an electrode active material, and improve charge/discharge life characteristics, and further, simplify manufacturing processes.

The invention provides an electrode of a metal powder substrate inductor. The electrode is arranged at an electrode of an inductor. The electrode comprises a base layer, a conductive layer and a tin layer which are sequentially laminated at the electrode, and the base layer is arranged at the electrode through an electroplating mode. The invention also provides a preparation method for the electrode of the metal powder substrate inductor. The preparation method comprises the following steps of fully or partially masking the inductor; removing a mask at the electrode of the inductor; preparing the base layer at the electrode; and sequentially preparing the conductive layer and the tin layer on the surface of the base layer. By reducing the usage of precious metal and the energy consumption in a process, the preparation cost of a conventional electrode process is substantially reduced, the electrode adhesive force is improved, the installation reliability of the electrode is enhanced, the preparation process is simplified, the yield of mass production is improved, the corrosion resistant capability of a metal powder substrate is improved, and the service life of a device is prolonged.

The invention provides a sleep apnea detecting and treating instrument. The sleep apnea detecting and treating instrument comprises a belt and a belt box, an electric stimulation treating instrument and an optical treating instrument, wherein the detecting instrument comprises a detecting part; the electric stimulation treating instrument comprises an electric stimulation treating instrument body, an optical fiber, an electrode adhesive and a blood oxygen detecting head; the electric stimulation treating instrument body comprises a light needle head; the light needle head refracts a light needle to the electrode adhesive through the optical fiber; the optical treating instrument comprises a laser diode or a light-emitting diode; and the light needle generating the wavelength of 610 to 980 nm refracts and transmits an optical signal through the optical fiber. The breathing state of a user is obtained by an acceleration sensing technique, so that the simple and convenient detection effect is achieved. A Lieque acupuncture point is stimulated by electric shock pulse and optical acupuncture and moxibustion, so that a blockage phenomenon can be relieved timely. In addition, optical treatment contributes to reducing sleep apnea and improving sleeping quality. The sleep apnea detecting and treating instrument has the advantages of lightness, convenience and simpleness. By the sleep apnea detecting and treating instrument, a mild patient can be detected and treated at home.

The invention discloses a thin film solar cell and a preparation method thereof. The thin film solar cell sequentially comprises a substrate, a front electrode, a semiconductor layer, a back electrode, an adhesive layer and a back sheet. The adhesive layer is made of epoxy resin; the back sheet is made of glass fiber reinforced plastic or organic glass. The solar cell and the preparation method can effectively reduce the cost of the adhesive layer and the back sheet, and can also add a multifunctional material layer so as to supplement the performances (such as water resistance, insulativity and the like) during a packaging period and to improve the packaging performance.

The invention provides a method for recycling a retired lithium ion battery positive electrode adhesive, and aims to recycle a positive electrode adhesive polyvinylidene fluoride (PVDF), so that the damage of fluorine to the positive electrode material and the pollution of fluorine to the ecological environment are reduced, and the solid waste reutilization is realized. The method comprises the following steps: soaking retired lithium ion battery positive electrode powder in an organic mixed solvent, then placing in a reaction kettle, mechanically stirring to fully dissolve an adhesive, separating by using a centrifugal machine to obtain the positive electrode powder and a PVDF-containing organic solution, and separating and recovering the organic mixed solvent and PVDF by using a vacuum rotary evaporation evaporator. According to the invention, the method is simple in process, short in flow and reasonable and feasible in technical route, the adhesive in the positive electrode powder of the retired lithium ion battery is recycled by utilizing the technology, the purity is high, the recycling rate reaches 98% or above, the adhesive can be used as a raw material for manufacturing pipes and membrane materials, and the separated organic mixed solvent can be recycled.